Indie Strategy Bundle | £6.99 | Steam | PC

Steam's second midweek madness Indie bundle offers slightly more raw value than the first due to its focus on expansive strategy titles. Revenge Of The Titans, Defense Grid, Sol Survivor, Anomaly: Warzone Earth and Sanctum all retail for more than the combined bundle price, and they're all really good. I'd especially recommend ROTT, which is a tough and exciting tower defence/RTS hybrid with an awesome retro vibe.